#!/usr/bin/node

const log = console.log;

let buf1 = new Buffer(256);//buffer字节数组
buf1[0]=0;

log(`buf1 length: ${buf1.length}\n`);
//log(`buf1:${buf1}`);

log(buf1);

for(let i=0;i<buf1.length;i++){
  buf1[i]=i;
}
log(buf1);

let buf2 = buf1.slice(246,256);
log('buf2:',buf2);
log(`buf2 length: ${buf2.length}`);

buf2.fill(0);
log('buf2:',buf2);
log('buf2',buf2.toJSON());


let arr = ['a',0xba,0,255,10];
let buf3 = new Buffer(arr);
log('buf3:',buf3);
log(`buf3 length: ${buf3.length}`);


let str = 'hello world';
let buf4 = new Buffer(str);
log('buf4:',buf4);
log(`buf4 length: ${buf4.length}`);


buf4.copy(buf3,0,0,buf3.length);
log('buf3:',buf3);
buf4.copy(buf3,0,0,buf4.length);
log('buf4:',buf4);
